Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nuoc tren » thuoc tren
duoc tren » thuoc tren, dung tren, dua tren
cua trong » cua truong, cua trung, ca trong
qua trong » quan trong, qua trinh, qua song
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cac » nhan cach, phan dau, phan lap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((nuoc tren) OR (duoc tren)) quang - hanh trinh ((cua trong) OR (qua trong)) cong san phan cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nuoc tren) or (duoc tren)) quang - hanh trinh ((cua trong) OR (qua trong)) cong san phan cac~".
• Adding a wildcard symbol may retrieve word variants: ((nuoc tren) or (duoc tren)) quang - hanh trinh ((cua trong) OR (qua trong)) cong san phan cac*.